l
Blocks
A block consists of the Unit that supplies the NX Unit power and the range of Units to which that
Unit supplies the NX Unit power. For example, in the configuration in the following figure there are
two blocks in the CPU Rack: the block with the CPU Unit and the block with the Additional NX Unit
Power Supply Unit.
Internal
circuits
End
Cover
NX Unit power supply
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
NX Unit power supply
Internal
power
supply
circuit
Unit power supply terminals
CPU Unit block
Additional NX Unit Power Supply Unit block
NX Unit connected to the
CPU Unit
NX Unit connected to the Additional
NX Unit Power Supply Unit
Additional NX Unit
Power Supply Unit
Internal
power
supply
circuit
Unit power
supply
(24 VDC)
Unit power supply terminals
NX-series
NX1P2 CPU
Unit
○
○
The total of the required Unit power supply capacity for these two blocks is the required power sup-
ply capacity of the Unit power supply for the CPU Rack.
Precautions for Correct Use
Use the same Unit power supply to supply the Unit power to one CPU Rack. If you supply pow-
er from different Unit power supplies, differences in electrical potential may cause unexpected
currents in the NX Unit power supply, which may result in failure or malfunction.
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Calculation Example
This section provides a calculation example for the configuration example that is given in
culation Example for the NX Unit Power Supply
Name
Model
Qua
ntity
Power consumption/
Unit
CPU Unit
NX1P2-1140DT
1
7.05 W
Additional I/O Power Supply
Unit
NX-PF0630
1
0.85 W
Digital Input Unit
NX-ID3317
4
0.90 W
Relay Output Unit
NX-OC2633
3
1.20 W
• The NX Unit power supply efficiency of the CPU Unit is 80%.
In this configuration example, there is only one block, the CPU Unit block.
Required power supply capacity of Unit power supply to CPU Rack
= Required Unit power supply capacity of CPU Unit block
4 Designing the Power Supply System
4-23
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
4-4 Selecting External Power Supplies and Protective Devices
4
4-4-1
Selecting the Unit Power Supply
Содержание NX1P2 series
Страница 8: ...Manual Structure 6 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 52: ...Revision History 50 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 82: ...2 System Configuration 2 10 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 170: ...a b Flat blade screwdriver 1 2 5 Installation and Wiring 5 26 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 174: ...4 Close the Memory Card cover 5 Installation and Wiring 5 30 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 176: ...4 Close the Memory Card cover 5 Installation and Wiring 5 32 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 224: ...0 4 mm Side view Front view 2 5 mm 5 Installation and Wiring 5 80 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 258: ...Appendices A 10 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 259: ...I Index I 1 NX series NX1P2 CPU Unit Hardware User s Manual W578 I...
Страница 262: ...Index I 4 NX series NX1P2 CPU Unit Hardware User s Manual W578...
Страница 263: ......